package com.cloudroam.common.mybatis;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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/**
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* 分页对象
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* 为和其他端保持一致
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* 重写 MyBatis-Plus 分页对象，将起始页从 1 改为 0
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*
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* @author
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*/
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public class LinPage<T> extends Page<T> {
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private static final long serialVersionUID = -2183463672525305273L;
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/**
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* 该构造方法使得 current 总为 0
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*/
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public LinPage() {
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super.setCurrent(0);
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}
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public LinPage(int current, int size) {
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this(current, size, 0);
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}
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public LinPage(int current, int size, int total) {
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this(current, size, total, true);
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}
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public LinPage(int current, int size, boolean isSearchCount) {
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this(current, size, 0, isSearchCount);
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}
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/**
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* 该构造方法将小于 0 的 current 置为 0
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*
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* @param current 当前页
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* @param size 每页显示条数，默认 10
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* @param total 总数
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* @param isSearchCount 是否进行 count 查询
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*/
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public LinPage(int current, int size, int total, boolean isSearchCount) {
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super(current, size, total, isSearchCount);
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if (current < 0) {
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current = 0;
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}
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super.setCurrent(current);
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}
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@Override
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public boolean hasPrevious() {
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return super.getCurrent() > 0;
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}
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@Override
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public boolean hasNext() {
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return super.getCurrent() + 1 < this.getPages();
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}
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/**
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* 重写计算偏移量，将分页从第 0 开始
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*
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* @return 偏移量
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*/
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@Override
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public long offset() {
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return getCurrent() > 0 ? super.getCurrent() * getSize() : 0;
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}
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}
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